Abstract
Multiwall carbon nanotubes (MWNTs) were modified with polycarbosilane-derived silicon carbide (SiC) to improve its dispersion in the polymer matrix. PEEK/LCP/MWNTs nanocomposites were prepared by melt blending. TEM images show the improved dispersion of SiC-coated MWNTs against agglomerated structure of pure MWNTs in the blend. FESEM images shows better fibrillation of LCP in presence of SiC-coated MWNTs. TGA reveals that nanocomposites with SiC-coated MWNTs shows higher thermal stability than MWNTs filled blend system. Based on enhanced dispersion, storage modulus, tensile modulus and tensile strength were increased drastically with the incorporation of SiC-coated MWNTs. Glass transition temperature of the nanocomposites shows significant improvement with the incorporation of MWNTs.
Highlights
Polymer blends have been developed for improvement of either a specific property or providing materials with a full set of required properties at the low price, improving processability and offering the means for industrial plastic waste recycling [1]
The reduction of viscosity of Poly(ether ether ketone) (PEEK)/liquid crystalline polymers (LCPs) blend as compared to pure PEEK is attributed to the interfacial slippage between the two polymers in binary blend
This clearly indicates that blending LCP with PEEK facilitates its processability
Summary
Polymer blends have been developed for improvement of either a specific property or providing materials with a full set of required properties at the low price, improving processability and offering the means for industrial plastic waste recycling [1]. The major challenges associated with development of high-performance nanocomposites are uniform dispersion of CNTs in the polymer matrix and developing a strong interfacial interaction which will lead to the effective load transfer from the polymer to the CNTs. In a very recent article [11] MWNTs coated with SiC were used to improve the dispersion of MWNTs in the polymer matrix. The overall goal was to develop PEEK/ LCP/MWNTs nanocomposites and determine the effect of MWNTs on thermal and mechanical properties of PEEK/LCP blend system. The effect of SiC-coated MWNTs on the properties of PEEK/LCP blend is studied with special attention to the dispersion in the blend system
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